Disney California Adventure's California Screamin' riders were screaming in frustration after ride operators had to stop the coaster midway, because a passenger stuck out a selfie stick.

The roller coaster was halted around noon Wednesday after a passenger, who was not named, pulled out the elongated stick that attaches to a cellphone or camera for a "selfie" while the ride was in progress, said Suzi Brown, Disneyland spokeswoman.

Selfie sticks are not allowed on attractions, she said. The ride was back up within an hour, she added.

"California screaming is shut down for 2 hours and stopped right at the top before the drop because someone pulled out a selfie stick," tweeted Tori Kosct.

"We just got emergency evacuated from California Screamin this is so scary," tweeted another passenger who goes by Abbi on Twitter.

As we wrote in April, the popularity of selfie sticks have become a problem and safety issue at theme parks because riders pull out the long rods in the moving ride vehicle, possibly jeopardizing themselves or other passengers.

Disney sent out a memo several months ago reminding its cast members to inform passengers to put away their devices.

Selfie sticks are not banned in the park but are treated like any personal belongings. Before jumping on a ride, visitors are told to keep them stowed away. Visitors are allowed to use them in and around the park.

"California screaming is shut down for 2 hours and stopped right at the top before the drop because someone pulled out a selfie stick," tweeted Tori Kosct.

"We just got emergency evacuated from California Screamin this is so scary," tweeted another passenger who goes by Abbi on Twitter.

As we wrote in April, the popularity of selfie sticks have become a problem and safety issue at theme parks because riders pull out the long rods in the moving ride vehicle, possibly jeopardizing themselves or other passengers.

Disney sent out a memo several months ago reminding its cast members to inform passengers to put away their devices.

Selfie sticks are not banned in the park but are treated like any personal belongings. Before jumping on a ride, visitors are told to keep them stowed away. Visitors are allowed to use them in and around the park.